Considerations when diode auctioneering multiple DC buses in a non-isolated DC distribution system
Considerations when diode auctioneering multiple DC buses in a non-isolated DC distribution system
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在非隔离直流配电系统中二极管拍卖多条直流母线时的注意事项
DOI：
10.1109/ests.2011.5770881
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
J. Fischer
中科院分区：
文献类型：
--
作者：
R. Cuzner;A. Bendre;J. Widmann;K. A. Stonger;S. M. Peshman;J. Carlton;J. Fischer
在船舶直流配电系统中，通过二极管拍卖从单独的主直流母线馈电的DC/DC功率变换器的输出来维持关键负载的功率连续性。为了最小化功率转换的尺寸/重量，非隔离三电平降压转换器用于将电压从较高的主总线电压电平（通常为1000 VDC）转换为较低的船舶负载DC电压（即，650 VDC、850 VDC等）。相同电压水平的两条总线并行没有问题。然而，如果使用多于一个降压转换器或多于一组降压转换器来创建多于一个电压馈送，该电压馈送通过拍卖二极管与连接到相对主总线的类似转换器相匹配，则在相对总线功率半导体的非同步换向状态期间可以创建用于循环电流的路径。此外，当应用多于一个接地故障时，两个或更多个总线的拍卖对保持整个船舶的电力连续性提出了特别的挑战。本文记录了基于3 MW系统模拟和测试的经验教训，并确定了可以采取的措施，以确保在正常运行模式下的鲁棒运行，并在多种接地故障情况下生存。
Power continuity is maintained to critical loads in shipboard DC distribution systems by diode auctioneering the outputs of DC/DC power converters fed from separate main DC buses. In order to minimize the size/weight of power conversion non-isolated three-level buck converters are used to convert voltage from a higher main bus voltage level (typically 1000VDC) to lower ship load DC voltages (i.e. 650VDC, 850VDC, etc.). Two buses of the same voltage level are paralleled without issue. However if more than one buck converter or group of paralleled buck converters are used to create more than one voltage feed that is paralleled with similar converters connected to the opposite main bus through auctioneering diodes then paths for circulating currents may be created during the unsynchronized commutation states of opposite bus power semiconductors. In addition, the auctioneering of two or more buses presents particular challenges to maintaining power continuity throughout the ship when more than one ground fault is applied. This paper documents the lessons learned based on simulation and tests on a 3MW system and identifies measures that can be taken to ensure robust operation during normal modes of operation and survive multiple ground fault scenarios.